CN104224406B - Cochlear implant reverse signal radio frequency transmission receiving chip and system - Google Patents
Cochlear implant reverse signal radio frequency transmission receiving chip and system Download PDFInfo
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- CN104224406B CN104224406B CN201410524820.0A CN201410524820A CN104224406B CN 104224406 B CN104224406 B CN 104224406B CN 201410524820 A CN201410524820 A CN 201410524820A CN 104224406 B CN104224406 B CN 104224406B
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Abstract
The invention discloses cochlear implant reverse signal radio frequency transmission receiving chip and system, wherein cochlear implant reverse signal radio frequency transmission receiving chip comprises: detecting circuit, amplifying circuit, analog to digital conversion circuit and transmitting pre-process circuit, wherein, detecting circuit, for the input signal rectification that will receive; Amplifying circuit, carries out filtering and amplification for signal detection exported; Analog to digital conversion circuit, for converting the signal after filter and amplification to digital signal, exports the digital signal that phase place is contrary; Launch pre-process circuit, for arranging amplifying circuit original state.The present invention for providing high sensitivity, high reliability, high stability, the cochlear implant reverse signal radio frequency transmission receiving chip of high integration and system, can make whole cochlear implant system more reliably, more power saving, volume be less.
Description
Technical field
The invention belongs to cochlear implant field, particularly cochlear implant reverse signal radio frequency transmission receiving chip and system.
Background technology
As everyone knows, cochlear implant mainly comprises external machine parts and is implanted in the implant component of human body brain, Figure 1 shows that the structural representation of cochlear implant.Its operation principle is, the acoustical signal that microphone transmits by the speech processor in external machine parts carries out processing and encoding, transmitting coil is passed through after obtaining coded signal, the receiving coil of implanting device is transmitted into through skin, then the decoding circuit of implant component carries out decoding acquisition decoded signal, and decoded signal is sent to the electrod-array of artificial cochlea, stimulate the auditory nerve of user, make user recover audition.
In prior art, reverse signal transmission receiving function is arranged in speech processor, build with discrete component, transmitting coil from receiving coil receive implant component feedback signal after by wire transmission to speech processor, the impact of such radio frequency signal is very large, and distant applicable cases is needed for speech processor and transmitting coil, be difficult to the signal transmission effect reaching expection, reverse signal may form closed loop feedback through the transmission of wire, signal, by increasing, causes last cochlear implant to work.
Summary of the invention
In view of this, the object of the present invention is to provide cochlear implant reverse signal radio frequency transmission receiving chip and system, high sensitivity, high reliability, high stability, high integration be provided, can make cochlear implant system more reliably, more power saving, volume be less.
For achieving the above object, the invention provides cochlear implant reverse signal radio frequency transmission receiving chip, at least comprising: detecting circuit, amplifying circuit, analog to digital conversion circuit and transmitting pre-process circuit, wherein,
Described detecting circuit, for the input signal rectification that will receive, comprise: rectification circuit, low-pass filter circuit, described rectification circuit has two inputs VINN, VINP, and the output after rectification is through the outfan RECT_OUT of described low-pass filter circuit to described detecting circuit;
Described amplifying circuit, signal for detection being exported carries out filtering and amplification, comprise: bias voltage source, high pass amplifying circuit, mutual conductance amplifying circuit, the input of described bias voltage source is connected with the outfan of described transmitting pre-process circuit, and outfan VF is connected with the in-phase input end of the operational amplifier in described high pass amplifying circuit; The in-phase input end of the operational amplifier in described high pass amplifying circuit is connected with the outfan RECT_OUT of described detecting circuit; Inverting input connects described high-pass filtering circuit; The outfan of high pass amplifying circuit is connected with the in-phase input end of mutual conductance amplifying circuit; The inverting input of mutual conductance amplifying circuit connects the capacity earth of described high-pass filtering circuit by high pass amplifying circuit inverting input; Mutual conductance amplifying circuit is difference output, two outfans VOUT2P, VOUT2N;
Analog-digital conversion circuit as described, comprising: Schmidt trigger, two phase inverters, and described Schmidt trigger is used for converting the signal after filter and amplification to digital signal, two input connections corresponding to VOUT2P, VOUT2N, and outfan is set to difference output; Described two phase inverters are used for the digital signal phasing back 180 degree of the difference output of Schmidt trigger, outfan VOUN, VOUTP of two phase inverters, export the digital signal that phase place is contrary;
Described transmitting pre-process circuit, acquiescence exports high level, and for arranging amplifying circuit original state, during the radio frequency of input S_WAVE sequential filming 64 μ s, outfan RST_OUT reset zero setting, RST_OUT is connected with the input of bias voltage source.
Alternatively, the rectification circuit in described detecting circuit is all-wave or halfwave rectifier.
Alternatively, the gain of described high pass amplifying circuit is 50; The gain of described mutual conductance amplifying circuit is 10.
Alternatively, the input S_WAVE level of described transmitting pre-process circuit at 0.9-1.1V time, reset zero setting signal can be triggered.
Alternatively, also comprise amplitude detection-flap Thickness sensitivity circuit, input is connected with the outfan RECT_OUT of described detecting circuit, for adjusting energy, saving system energy consumption after detected amplitude and flap thickness.
Alternatively, also comprise transmitting auxiliary circuit, for regulation voltage amplitude, pulsewidth and elimination repercussions, two inputs of described transmitting auxiliary circuit are connected respectively with input VINN, VINP of described detecting circuit, and outfan DRV is drive singal.
Based on above-mentioned purpose, the present invention also provides a kind of system comprising above-mentioned cochlear implant reverse signal radio frequency transmission receiving chip, comprise radio-frequency transmissions driving, radio-frequency sending coil, compound coil, cochlear implant reverse signal radio frequency transmission receiving chip and implant receiving coil, wherein
The input that described radio-frequency transmissions drives is S_WAVE, and outfan connects described radio-frequency sending coil;
Described radio-frequency sending coil, for described implant receiving coil emitting radio frequency signal;
Described compound coil, arrange with described radio-frequency sending coil is parallel, for from described radio-frequency sending coil coupled signal, the phase place of described coupled signal is identical with the contained signal of radio-frequency sending coil, and the amplitude of described coupled signal is the 10%-90% of the contained signal amplitude of radio-frequency sending coil;
Input VINN, VINP of described cochlear implant reverse signal radio frequency transmission receiving chip are connected respectively with described compound coil two ends, and the signal for being coupled to by described compound coil carries out decoding, Digital output VOUTP or VOUTN;
Described implant receiving coil is used for the signal feedback of implant to radio-frequency sending coil.
Alternatively, the input that described radio-frequency transmissions drives also can be connected with the outfan DRV of the transmitting auxiliary circuit of described cochlear implant reverse signal radio frequency transmission receiving chip.
Beneficial effect of the present invention is: arrange compound coil and reverse signal radio frequency transmission receiving chip, extract the impact reducing radio frequency signal, signal processing completes completely in head, without radio frequency downlink transfer, increase stability, reduce the quantity of transmission line, avoid wire and surrounding on the impact of RF, increase and connect distance.The cochlear implant system of high sensitivity, high reliability, high stability, high integration is provided.
Accompanying drawing explanation
In order to make object of the present invention, technical scheme and beneficial effect clearly, the invention provides following accompanying drawing and being described:
Fig. 1 is prior art cochlear implant system structure schematic diagram;
The structured flowchart of an embody rule example in the cochlear implant reverse signal radio frequency transmission receiving chip of Fig. 2 embodiment of the present invention;
The structured flowchart of another embody rule example in the cochlear implant reverse signal radio frequency transmission receiving chip of Fig. 3 embodiment of the present invention;
The circuit theory diagrams of an embody rule example in the cochlear implant reverse signal radio frequency transmission receiving chip of Fig. 4 embodiment of the present invention;
The system structure schematic diagram of what Fig. 5 was the embodiment of the present invention the comprise reverse signal of cochlear implant shown in Fig. 2 radio frequency transmission receiving chip;
The system structure schematic diagram of what Fig. 6 was the embodiment of the present invention the comprise reverse signal of cochlear implant shown in Fig. 3 radio frequency transmission receiving chip;
Fig. 7 is the reverse decoding output waveform figure of the system that cochlear implant reverse signal radio frequency transmission of the prior art receives;
Fig. 8 is the reverse decoding output waveform figure of the system of the cochlear implant reverse signal radio frequency transmission receiving chip of the embodiment of the present invention;
Fig. 9 is the reverse decoding output waveform figure adding the system of the cochlear implant reverse signal radio frequency transmission receiving chip after impedance of the embodiment of the present invention;
Figure 10 is the reset signal working waveform figure of the cochlear implant reverse signal radio frequency transmission receiving chip of the embodiment of the present invention;
Figure 11 is the reverse decoding output waveform figure of the display reset signal function of the system of the cochlear implant reverse signal radio frequency transmission receiving chip of the embodiment of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are described in detail.
The invention discloses cochlear implant reverse signal radio frequency transmission receiving chip, see Fig. 2-4, be depicted as structured flowchart and the circuit theory diagrams of the cochlear implant reverse signal radio frequency transmission receiving chip 100 of the embodiment of the present invention, comprise: detecting circuit 10, amplifying circuit 20, analog to digital conversion circuit 30 and transmitting pre-process circuit 40, wherein
Described detecting circuit 10, for the input signal rectifying and wave-filtering that will receive, comprise: rectification circuit 110, low-pass filter circuit 120, described rectification circuit 110 has two inputs VINN, VINP, and the output after rectification is through the outfan RECT_OUT of described low-pass filter circuit 120 to described detecting circuit 10; Rectification circuit 110 in described detecting circuit 10 is all-wave or halfwave rectifier, is the embodiment of all wave rectification shown in Fig. 4; In low-pass filter circuit 120, low-pass filter network forms for R1 and C1, is preferably R1=120K Ω, C1=10pF;
Described amplifying circuit 20, signal RECT_OUT for being exported by detecting circuit 10 carries out filtering and amplification, comprise: bias voltage source 230, high pass amplifying circuit 210, mutual conductance amplifying circuit 220, the input of described bias voltage source 230 is connected with the outfan of described transmitting pre-process circuit 40, and outfan VF is connected with the in-phase input end of the operational amplifier 211 in described high pass amplifying circuit 210; The in-phase input end of the operational amplifier 211 in described high pass amplifying circuit 210 is connected with the outfan RECT_OUT of described detecting circuit 10; Inverting input connects described high-pass filtering circuit, described high-pass filtering circuit is made up of R3 and C3, the inverting input of R3 two ends difference concatenation operation amplifier 211 and outfan OUTP, C3 is connected with the inverting input of operational amplifier 211 by R4, be preferably R3=60K Ω, C3=0.1 ~ 0.22 μ F, D2 and D3 plays the effect of clamper; The outfan OUTP of high pass amplifying circuit 210 is connected with the in-phase input end of mutual conductance amplifying circuit 220; The inverting input of mutual conductance amplifying circuit 220 connects the electric capacity C3 ground connection of high-pass filtering circuit by described high pass amplifying circuit 210 inverting input; Mutual conductance amplifying circuit 220 is difference output, two outfans VOUT2P, VOUT2N;
Analog-digital conversion circuit as described 30, comprise: Schmidt trigger 310, two phase inverters 320, described Schmidt trigger 310 for converting the signal after filter and amplification to digital signal, two input connections corresponding to VOUT2P, VOUT2N, outfan is set to difference output VOP, VON; Described two phase inverters 320 are for digital signal VOP, VON phasing back 180 degree of the difference output by Schmidt trigger 310, and outfan VOUN, VOUTP of two phase inverters, export the digital signal that phase place is contrary;
Described transmitting pre-process circuit 40, acquiescence exports high level, for arranging amplifying circuit 20 original state, during the radiofrequency signal of input S_WAVE sequential filming 64 μ s, outfan RST_OUT reset zero setting, RST_OUT is connected with the input of bias voltage source 230, when RST_OUT is 0, the outfan VF of bias voltage source 230 exports the voltage being preferably 0.85V, start operational amplifier 211 to start working, start to receive the signal RECT_OUT that in-phase input end enters, it is amplified.
Further, the gain of described high pass amplifying circuit 210 is 50; The gain of described mutual conductance amplifying circuit 220 is 10.
Further, the input S_WAVE level of described transmitting pre-process circuit 40 at 0.9-1.1V time, reset zero setting signal can be triggered.
Further, also comprise amplitude detection-flap Thickness sensitivity circuit 50, input is connected with the outfan RECT_OUT of described detecting circuit 10, for adjusting energy, saving system energy consumption after detected amplitude and flap thickness.
Further, also comprise and launch auxiliary circuit 60, for regulation voltage amplitude, pulsewidth and elimination repercussions, two inputs of described transmitting auxiliary circuit 60 are connected respectively with input VINN, VINP of described detecting circuit 10, and outfan DRV is drive singal.
Corresponding with above-mentioned cochlear implant reverse signal radio frequency transmission receiving chip, further embodiment of this invention provides the system comprising cochlear implant reverse signal radio frequency transmission receiving chip, see Fig. 5-6.Comprise radio-frequency transmissions driving 200, radio-frequency sending coil 201, compound coil 101, cochlear implant reverse signal radio frequency transmission receiving chip 100 and implant receiving coil 301, wherein, the input of described radio-frequency transmissions driving 200 is S_WAVE, or comprising transmitting auxiliary circuit 60 at cochlear implant reverse signal radio frequency transmission receiving chip 100, then radio-frequency transmissions drives the input of 200 to be the output DRV launching auxiliary circuit 60; Outfan connects described radio-frequency sending coil 201;
Described radio-frequency sending coil 201, for described implant receiving coil 301 emitting radio frequency signal;
Described compound coil 101, arrange with described radio-frequency sending coil 201 is parallel, for from described radio-frequency sending coil 201 coupled signal, the phase place of described coupled signal is identical with the contained signal of radio-frequency sending coil 201, the amplitude of described coupled signal is the 10%-90% of the contained signal amplitude of radio-frequency sending coil 201, and cochlear implant reverse signal radio frequency transmission receiving chip 100 so just can be facilitated to process;
Input VINN, VINP of described cochlear implant reverse signal radio frequency transmission receiving chip 100 are connected respectively with described compound coil 101 two ends, and the signal for being coupled to by described compound coil 101 carries out decoding, Digital output VOUTP or VOUTN;
Described implant receiving coil 301 for by the signal feedback of implant to radio-frequency sending coil 201.
For operation principle of the present invention, functional realiey and beneficial effect are more clearly described, provide Fig. 7-11.The reverse decoding output waveform figure of the system that cochlear implant reverse signal radio frequency transmission of the prior art receives shown in Fig. 7: curve 1 is reset signal, the system starts when it is 0, carries out detection, amplification and decoding and exports; Curve 2 is the output after reverse signal detection, amplification, and noise is very little; The digital signal of curve 3 output is anti-phase output, and the visible digital signal exported occurs 1 output and position at random in the place that reverse signal is continuously multiple 0, and decoding makes mistakes.This is because cochlear implant reverse signal radio frequency transmission receiving circuit discrete component is built in prior art, be arranged in speech processor, transmitting coil from receiving coil receive implant component feedback signal after by wire transmission to the cochlear implant reverse signal radio frequency transmission receiving circuit speech processor, the impact of such radio frequency signal is very large, and distant applicable cases is needed for speech processor and transmitting coil, be difficult to the signal transmission effect reaching expection, reverse signal may form closed loop feedback through the transmission of wire, signal is by increasing, last cochlear implant is caused to work.
Fig. 8 is the reverse decoding output waveform figure of the system of the cochlear implant reverse signal radio frequency transmission receiving chip of the embodiment of the present invention: curve 11 is output signal RECT_OUT of detecting circuit 10; Curve 12 is that RECT_OUT averages, more clear and intuitive compared with curve 11; Curve 13 is output VOUTN of cochlear implant reverse signal radio frequency transmission receiving chip 100, is anti-phase output; Curve 14 is RECT_OUT output VOUT2P after amplifying circuit 20; Curve 15 launches the output reset signal RST_OUT of pre-process circuit 40, visible, under almost identical noise situations, exports VOUTN very clean, smooth, eliminate reverse signal continuously multiple 0 time, numeral exports the situation occurring mistake.
Fig. 9 be the embodiment of the present invention add impedance after the reverse decoding output waveform figure of system of cochlear implant reverse signal radio frequency transmission receiving chip: curve 11 is output signal RECT_OUT of detecting circuit 10; Curve 13 is output VOUTP of cochlear implant reverse signal radio frequency transmission receiving chip 100, for homophase exports; Curve 14 is RECT_OUT output VOUT2P after amplifying circuit 20; Curve 15 is the output reset signal RST_OUT launching pre-process circuit 40, visible, after Reality simulation service condition adds impedance, reverse decoded digital exports accurate zero defect, also eliminate reverse signal continuously multiple 0 time, numeral exports the situation occurring mistake, substantially increases the reliability that reverse signal decoding exports.
Figure 10 is the reset signal working waveform figure of the cochlear implant reverse signal radio frequency transmission receiving chip of the embodiment of the present invention: curve 15 is the output reset signal RST_OUT launching pre-process circuit 40, curve 16 is the input S_WAVE launching pre-process circuit 40, visible when the radiofrequency signal of 64 μ s appears in S_WAVE, outfan RST_OUT reset zero setting; When input S_WAVE is 0, outfan RST_OUT exports high level, and pre-process circuit 40 is launched in the input of S_WAVE signal, and follow-on test all inerrancy occurs, reliability is high.
Figure 11 is the reverse decoding output waveform figure of the display reset signal function of the system of the cochlear implant reverse signal radio frequency transmission receiving chip of the embodiment of the present invention: curve 13 is output VOUTP of cochlear implant reverse signal radio frequency transmission receiving chip 100, for homophase exports; Curve 14 is RECT_OUT output VOUT2P after amplifying circuit 20; Curve 15 is the output reset signal RST_OUT launching pre-process circuit 40, visible, when RST_OUT is 0, cochlear implant reverse signal radio frequency transmission receiving chip 100 starts normal work, decoding exports accurate, when RST_OUT is high level, cochlear implant reverse signal radio frequency transmission receiving chip 100 does not work, and exports random.
The present invention is compared with existing technical scheme, compound coil signal extraction is adopted to reduce the impact of radio frequency signal, signal processing completes completely on transmitting coil, without radio frequency downlink transfer, increase stability, reduce the quantity of transmission line, avoid the impact of wire and surrounding radio frequency, improve sensitivity simultaneously, add connection distance.Provide high sensitivity, high reliability, high stability, the cochlear implant reverse signal radio frequency transmission receiving chip of high integration and system, can make whole cochlear implant system more reliably, more power saving, volume be less.
What finally illustrate is, above preferred embodiment is only in order to illustrate technical scheme of the present invention and unrestricted, although by above preferred embodiment to invention has been detailed description, but those skilled in the art are to be understood that, various change can be made to it in the form and details, and not depart from claims of the present invention limited range.
Claims (8)
1. a cochlear implant reverse signal radio frequency transmission receiving chip, is characterized in that, at least comprise: detecting circuit, amplifying circuit, analog to digital conversion circuit and transmitting pre-process circuit, wherein,
Described detecting circuit, for the input signal rectification that will receive, comprise: rectification circuit, low-pass filter circuit, described rectification circuit has two inputs VINN, VINP, and the output after rectification is through the outfan RECT_OUT of described low-pass filter circuit to described detecting circuit;
Described amplifying circuit, signal for detection being exported carries out filtering and amplification, comprise: bias voltage source, high pass amplifying circuit, mutual conductance amplifying circuit, the input of described bias voltage source is connected with the outfan of described transmitting pre-process circuit, and outfan VF is connected with the in-phase input end of the operational amplifier in described high pass amplifying circuit; The in-phase input end of the operational amplifier in described high pass amplifying circuit is connected with the outfan RECT_OUT of described detecting circuit; Inverting input connects high-pass filtering circuit; The outfan of high pass amplifying circuit is connected with the in-phase input end of mutual conductance amplifying circuit; The inverting input of mutual conductance amplifying circuit connects the capacity earth of high-pass filtering circuit by high pass amplifying circuit inverting input; Mutual conductance amplifying circuit is difference output, two outfans VOUT2P, VOUT2N;
Analog-digital conversion circuit as described, comprising: Schmidt trigger, two phase inverters, and described Schmidt trigger is used for converting the signal after filter and amplification to digital signal, two input connections corresponding to VOUT2P, VOUT2N, and outfan is set to difference output; Described two phase inverters are used for the digital signal phasing back 180 degree of the difference output of Schmidt trigger, outfan VOUN, VOUTP of two phase inverters, export the digital signal that phase place is contrary;
Described transmitting pre-process circuit, acquiescence exports high level, input S_WAVE, outfan RST_OUT, for arranging amplifying circuit original state, during the radiofrequency signal of input S_WAVE sequential filming 64 μ s, outfan RST_OUT reset zero setting, RST_OUT is connected with the input of bias voltage source.
2. cochlear implant reverse signal radio frequency transmission receiving chip as claimed in claim 1, it is characterized in that, the rectification circuit in described detecting circuit is all-wave or halfwave rectifier.
3. cochlear implant reverse signal radio frequency transmission receiving chip as claimed in claim 1, it is characterized in that, the gain of described high pass amplifying circuit is 50; The gain of described mutual conductance amplifying circuit is 10.
4. cochlear implant reverse signal radio frequency transmission receiving chip as claimed in claim 1, is characterized in that, the input S_WAVE level of described transmitting pre-process circuit at 0.9-1.1V time, reset zero setting signal can be triggered.
5. the cochlear implant reverse signal radio frequency transmission receiving chip as described in one of claim 1-4, it is characterized in that, also comprise amplitude detection-flap Thickness sensitivity circuit, input is connected with the outfan RECT_OUT of described detecting circuit, for adjusting energy, saving system energy consumption after detected amplitude and flap thickness.
6. the cochlear implant reverse signal radio frequency transmission receiving chip as described in one of claim 1-4, it is characterized in that, also comprise transmitting auxiliary circuit, for regulation voltage amplitude, pulsewidth and elimination repercussions, two inputs of described transmitting auxiliary circuit are connected respectively with input VINN, VINP of described detecting circuit, and outfan DRV is drive singal.
7. one kind adopts the system of cochlear implant reverse signal radio frequency transmission receiving chip described in claim 6, it is characterized in that, comprise radio-frequency transmissions driving, radio-frequency sending coil, compound coil, cochlear implant reverse signal radio frequency transmission receiving chip and implant receiving coil, wherein
The input that described radio-frequency transmissions drives is S_WAVE, and outfan connects described radio-frequency sending coil;
Described radio-frequency sending coil, for described implant receiving coil emitting radio frequency signal;
Described compound coil, arrange with described radio-frequency sending coil is parallel, for from described radio-frequency sending coil coupled signal, the phase place of described coupled signal is identical with the contained signal of radio-frequency sending coil, and the amplitude of described coupled signal is the 10%-90% of the contained signal amplitude of radio-frequency sending coil;
Input VINN, VINP of described cochlear implant reverse signal radio frequency transmission receiving chip are connected respectively with described compound coil two ends, and the signal for being coupled to by described compound coil carries out decoding, Digital output VOUTP or VOUTN;
Described implant receiving coil is used for the signal feedback of implant to radio-frequency sending coil.
8. the system of cochlear implant reverse signal radio frequency transmission receiving chip as claimed in claim 7, it is characterized in that, the input that described radio-frequency transmissions drives also can be connected with the outfan DRV of the transmitting auxiliary circuit of described cochlear implant reverse signal radio frequency transmission receiving chip.
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| CN104836313B (en) * | 2015-05-19 | 2017-08-04 | 浙江诺尔康神经电子科技股份有限公司 | A kind of language processing device for artificial cochlea wireless charging device and method |
| CN105975885B (en) * | 2016-06-01 | 2018-12-21 | 广东楚天龙智能卡有限公司 | A kind of monitor of IC card communication signal |
| CN106955419B (en) * | 2017-05-04 | 2023-06-09 | 浙江诺尔康神经电子科技股份有限公司 | Low-power consumption decoding circuit of external machine of electronic cochlea |
| CN107124234B (en) * | 2017-06-01 | 2020-07-31 | 浙江诺尔康神经电子科技股份有限公司 | Wireless transmission coil drop monitoring circuit and system |
| WO2024084333A1 (en) * | 2022-10-17 | 2024-04-25 | Cochlear Limited | Techniques for measuring skin flap thickness using ultrasound |
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